Fucking pathetic

I wrote a long letter to my ex this morning and I couldn't send it because of how pathetic it seemed to me. Why are you hurting me, change please -- I mean, good god. If he was any kind of man he would do it on his own. Why does he need a fucking letter to remind him to be a good person and have some goddamn compassion?
That's what 10 years gets you, ladies and gentlemen. A pathetic whining mass who has plenty to get done but takes an hour to write a letter that's absolutely useless. Problem is, I don't know how to let go. I've honestly tried. Problem is that I don't know how to fill the gaping void he leaves in my life. He's more than just a romantic interest - he's a mentor and a role-model (at least professionally) and is the smartest man I know. I wish I could keep those parts and discard the romantic interest, but all of those things wrap up together for a truly wonderful experience. So what brought the trouble to Paradise then, you ask? Simple - he's a cheater. A big liar. An egomaniac who can't make decisions based on anything but his own wants and needs. Right now he's living with his ex (not me - the one he cheated on me with) so that he can save money. He was supposed to move out in January - he's still there and it's almost May. And yet somehow I'm supposed to believe that he cares about me and still loves me? Sad part is that I try really hard to believe it because it's what I want more than anything - to have that wonderful experience all the time.
When I was younger I had a best friend we'll call M. M and I had some pretty strange things happen to us, some of which I can't explain to this day, but the whole time I wondered if it was a lie. Eventually, growing up led to us parting ways - she moved on and I didn't. It strained our relationship to the breaking point because I still wanted the wonder. I think she got tired of it, maybe she got tired of me. The point of this is that I tend to fall in with people who lie to me, or at least put themselves in less than credible situations, and I believe them. Then once they're done they try to move on and I'm still stuck. Or in this case they keep stringing me along and I can't break free.
I'm beginning to wonder if real life will ever hold the joy for me that I want it to have. Everything hurts right now. I feel like a teenager all over again, powerless to change the things in my life that make me unhappy.
I can't think of any snappy lines or good sentences to end this post. You'll just have to go on without it.